Convert Base64 to PDF

Paste a Base64-encoded PDF string or upload a text file containing Base64 data, then decode and download the original PDF instantly in your browser.

Free PDF tool Files deleted after 1 hour Browser-based PDF processing Works with common PDF files

Upload your base64 file and download the converted PDF.

Base64 decoding

Convert raw Base64 text into a downloadable PDF file.

Data URI support

Accepts strings that begin with data:application/pdf;base64.

Paste or upload

Paste encoded text directly or upload a text (.txt) file.

Automatic validation

Detects invalid characters, truncation, and missing padding.

How to Use

Paste a Base64-encoded PDF string or upload a text file containing Base64 data.
The tool validates and decodes the content.
Download the reconstructed PDF and open it to verify the result.

Tips Before You Convert

Remove spaces and line breaks if the Base64 string was copied from email or JSON.
Strings beginning with data:application/pdf;base64, are supported automatically.
If decoding fails, verify that the full string was copied and includes proper padding.
Open the downloaded PDF to confirm the file is complete and not corrupted.

Real-World Scenarios

API responses: decode PDF documents returned as Base64 from REST APIs.
Database storage: reconstruct PDFs stored as encoded text in records.
Email integrations: convert Base64 attachments into readable PDF files.
Developer debugging: verify that generated Base64 strings contain valid PDF data.

Frequently Asked Questions

How are uploaded files handled?

Uploaded files are used only for processing and are automatically deleted after 1 hour. Avoid uploading files containing passwords, API keys, private credentials, or sensitive personal data.

What is Base64?

Base64 is a text encoding method that converts binary data into ASCII characters for safe transmission in APIs, emails, and JSON.

Can I paste a data URI?

Yes. Strings beginning with data:application/pdf;base64, are automatically detected and decoded.

What happens if the Base64 string is invalid?

The converter will display an error if characters are missing, corrupted, or if the string is incomplete.

Why does the downloaded PDF not open?

The original Base64 data may be truncated or may not represent a valid PDF file.

Are my files stored permanently?

No. Uploaded data and generated PDFs are automatically deleted from the server after 1 hour.

Comments and Feedback Facing an issue with this tool? Share a quick comment so we can improve it.